<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面走丢啦！</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', sans-serif;
        }

        body {
            background: #f0f2f5;
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .error-container {
            background: white;
            padding: 40px;
            border-radius: 20px;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            text-align: center;
            max-width: 600px;
            width: 100%;
        }

        .error-code {
            font-size: 120px;
            font-weight: bold;
            color: #4a5568;
            margin-bottom: 20px;
            background: linear-gradient(45deg, #63b3ed, #e83e8c);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .error-message {
            font-size: 24px;
            color: #4a5568;
            margin-bottom: 30px;
        }

        .error-description {
            color: #718096;
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .home-btn {
            display: inline-block;
            padding: 12px 30px;
            background: #63b3ed;
            color: white;
            text-decoration: none;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .home-btn:hover {
            background: #4299e1;
            transform: translateY(-2px);
        }

        .decorative-circle {
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: #e2e8f0;
            opacity: 0.3;
            animation: float 3s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0) scale(0.9); }
            50% { transform: translateY(-20px) scale(1); }
        }
    </style>
</head>
<body>
    <div class="error-container">
        <div class="decorative-circle" style="top: -80px; left: -80px;"></div>
        <div class="decorative-circle" style="bottom: -80px; right: -80px;"></div>
        
        <h1 class="error-code">404</h1>
        <p class="error-message">哎呀，页面走丢啦！</p>
        <p class="error-description">
            您访问的页面似乎不存在或已被移动。<br>
            请检查URL是否正确，或返回首页继续探索。
        </p>
        <a href="/" class="home-btn">返回首页</a>
    </div>
</body>
</html>